JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank Rate of decay and Half-life

  • question_answer
    A radioactive element has half-life of one day. After three days, the amount of the element left will be [MNR 1985; UPSEAT 2000, 01; MH CET 2002]

    A)                 1/2 of the original amount

    B)                 1/4 of the original amount

    C)                 1/8 of the original amount

    D)                 1/16 of the original amount

    Correct Answer: C

    Solution :

              \[n=\frac{3}{1}=3;\,N=\frac{{{N}_{o}}}{{{2}^{3}}}=\frac{1}{8}\]


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